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Ultrasonic atomizing fire extinguisher

An ultrasonic atomization and fire extinguisher technology, applied in fire rescue and other directions, can solve the problems of small fog flux, inability to use fire extinguishing, low droplet mass fraction, etc., and achieve the effect of avoiding dilution

Inactive Publication Date: 2008-07-30
UNIV OF SCI & TECH OF CHINA
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AI Technical Summary

Problems solved by technology

In this existing structural form, the fine water mist produced by the ultrasonic transducer is greatly diluted by a large amount of air introduced by the ventilation unit through the air suction port, resulting in a low droplet mass fraction in the unit volume of the fine water mist and low mist flux. Small, cannot be used for fire fighting

Method used

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  • Ultrasonic atomizing fire extinguisher

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Embodiment Construction

[0017] Referring to FIG. 1 , according to the conventional structure of the ultrasonic atomization device, the arrangement in the atomizer housing 2 includes a power supply unit 8 , a water level adjustment unit 10 and an ultrasonic atomization unit 9 .

[0018] In this embodiment, in order to increase the mist flux and increase the mass fraction of mist droplets per unit volume, a circulation fan 1 is arranged in the atomization chamber 6 to form a circulating air flow inside the atomization chamber, and the outlet of the gas-water two-phase flow is used as the atomizer The water mist outlet 5 of chamber 6.

[0019] In specific implementation, the circulation fan 1 together with the circulation fan air inlet 3 and the circulation fan outlet 4 are all located in the atomization chamber 6 , and the water mist outlet 5 deviates from the circulation fan air inlet 3 and the circulation fan outlet 4 .

[0020] A gas fire extinguishing agent inlet passage 7 can be provided, and the ...

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Abstract

The invention relates to an ultrasonic atomization fire extinguisher, which comprises a power supply unit, a water level adjusting unit and an ultrasonic atomization unit, which is characterized in that a circulating fan that is arranged in an atomization cavity and forms internal circulating airflow of the atomization cavity and an overflow port of gas phase and water phase is a water mist outlet of the atomization cavity. A ventilation unit of the invention realizes the circulation flow of air in an atomizer, thus preventing outside air from diluting the water mist, greatly prompting the dripping mass fraction of the water mist and causing ultrasonic atomization to be applied in fire fighting.

Description

technical field [0001] The invention relates to a fire extinguisher for fire-fighting that can be used to effectively suppress oil and electrical fires, and surface fires of solid combustibles, more specifically a fine water mist fire extinguisher. Background technique [0002] Halon fire extinguishing agent has high fire extinguishing performance, but it has damage to the ozone layer. All countries in the world are studying the substitutes of halon fire extinguishing agent. Water mist is one of the potential alternatives. Fine water mist refers to the water mist whose average particle size of 99% of the droplets is not greater than 1000μm on the plane 1m away from the nozzle under the minimum design working pressure. Fine water mist can be produced by impact, pneumatic, high pressure or ultrasonic atomization. At present, the fine water mist for firefighting is usually produced by spraying water with a certain pressure through the fine water mist nozzle. In this system, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62C35/02
Inventor 刘益民廖光煊秦俊
Owner UNIV OF SCI & TECH OF CHINA
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